Check out the Left 4 Dead Walkthrough to find details of how to win 65 Achievements from this game, worth a total of 2833 TrueAchievement points (1500 Gamerscore)

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Left 4 DeadAbout the Game (taken from the Steam Store)"From Valve (the creators of Counter-Strike, Half-Life and more) comes Left 4 Dead, a co-op action horror game for the PC and Xbox 360 that casts up to four players in an epic struggle for survival against swarming zombie hordes and terrifying mutant monsters.Set in the immediate aftermath of the zombie apocalypse, L4D's survival co-op mode lets you blast a path through the infected in four unique “movies,” guiding your survivors across the rooftops of an abandoned metropolis, through rural ghost towns and pitch-black forests in your quest to escape a devastated Ground Zero crawling with infected enemies